Armature is installed and have fire at both plugs. That ground wire from the armature is required to make the system work. As I understand it any open in that wire will kill the engine. A normal key switch does the opposite, off position it grounds the armature, so will have to put a separate ON/OFF switch in that ground wire to kill the engine. This in on an old B&S 16hp horizontal twin L Head engine. Am I missing something or is this the route to go?